Discovering the Unique Beauty of Organ Pipe Cactus National Monument Located in southwestern Arizona, Organ Pipe Cactus National Monument is a UNESCO Biosphere Reserve that showcases the incredible diversity of the Sonoran Desert flora.
Discovering the Unique Beauty of Organ Pipe Cactus National Monument
Located in southwestern Arizona, Organ Pipe Cactus National Monument is a UNESCO Biosphere Reserve that showcases the incredible diversity of the Sonoran Desert flora. This fascinating region is home to an array of unique and adapted plant species, including the iconic organ pipe cactus (Stetsonia cactus). As you explore this vast desert landscape, keep your eyes peeled for these magnificent plants, which can grow up to 20 feet tall and live for hundreds of years.
 or fall (September-November). During these periods, the temperatures are comfortable, and the wildflowers are in bloom.
Practical Information
- Location: 310 N. Highway 85, Ajo, AZ 85321
- Phone: 520-387-6849
- Hours: 24/7; Visitor Center hours: 8 am - 5 pm (Monday - Thursday), 8 am - 4:30 pm (Friday - Sunday)
- Admission Fees: Free admission for all visitors